Binary Calculator
thingiverse
I really loved evgiz0r's binary tower (https://www.thingiverse.com/thing:3163974), but my first print was too unreliable. I started editing his shared Fusion 360 file to see if I could improve it. I managed to make it a bit more reliable, but gave up after a while. I thought my Fusion skills were poor. Messing with sketches that are worse than my own is nerve-wracking. Instead, I decided to start over and use actual moving switches like the ones you see everywhere else. I continued designing my version using the same 9.5mm ball as he did. Since I have 11mm bearings, I up-scaled to print mine. I've never actually printed at 100%. I suggest scaling and printing one to the size you need, then checking to see if it works. If the ball falls through without getting caught by the switch, scale down a bit. It's easy to assemble. Place the switch in position and slap the cover on. Before gluing them together, you may want to file down the top of the walls. Top being the top as they are laying on the bed after printing. This will allow the pieces to lay flatter against each other.
With this file you will be able to print Binary Calculator with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Binary Calculator.